Responses
http://www.mangago.me/read-manga/franken_fran/
http://www.mangago.me/read-manga/bradherley_no_basha/
And you might already know this, but check out everything by the mangaka Junji Ito, especially Uzumaki and Tomie imo.
looking for really good horror story the kind that can keep you up at night hehe preferably completed